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Finding the Fourth Proportional to 1,101.32, 1,652.32 and 689.88

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Solution

The fourth proportional to 1,101.32, 1,652.32 and 689.88 is: 1,035.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.32 : 1,652.32 = 689.88 : x
  2. Step 2: Convert to fraction form
    1,101.32/1,652.32 = 689.88/x
  3. Step 3: Cross multiply
    1,101.32x = 1,652.32 × 689.88
  4. Step 4: Simplify right side
    1,101.32x = 1,139,902.52
  5. Step 5: Solve for x
    x = 1,139,902.52/1,101.32
  6. Step 6: Final answer
    x = 1,035.03

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.